# The unit of sensitivity of an instrument is?

By Raj Vimal|Updated : October 13th, 2022

(A) ampere/sec

(B) volt/ohm

(C) volt-amp

(D) ohm/volt

The unit of sensitivity of an instrument is ohm/volt. It can be summed up as the proportion between changes in an instrument's output and changes in the value of the quantity being measured. It represents the smallest variation in the variable being monitored to which the instrument reacts.

### Unit of Sensitivity of an Instrument

The sensitivity of an instrument is found by dividing the sum of the resistance of meter (Rm ) and the series resistance (Rs ), by the full-scale reading in volts.

Sensitivity (S) = change in output/ unit change in input = Δ output/Δinput

Sensitivity is mathematically written as:

Sensitivity = (Rm + Rs)/E

Expressing the above expression in units, we get:

Sensitivity = Ohms/Volt

Unit of instrument sensitivity is expressed in Ohm/Volt

Sensitivity is also expressed as:

Sensitivity = 1/ampere

As a result, it is argued that sensitivity is equal to the full-scale deflection current's reciprocal.

Summary:

## The unit of sensitivity of an instrument is? (A) ampere/sec (B) volt/ohm (C) volt-amp (D) ohm/volt

Ohm/volt is the measurement of an instrument's sensitivity. The ratio between changes in an instrument's output and changes in the value of the quantity being monitored can be used to summarise it. It stands for the smallest change in the variable under observation to which the instrument responds.